221285033 has 8 divisors (see below), whose sum is σ = 224163240. Its totient is φ = 218419200.

The previous prime is 221285011. The next prime is 221285059. The reversal of 221285033 is 330582122.

It can be written as a sum of positive squares in 4 ways, for example, as 155950144 + 65334889 = 12488^2 + 8083^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 221285033 - 2⁶ = 221284969 is a prime.

It is a super-2 number, since 2×221285033² = 97934131659622178, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 221284993 and 221285011.

It is not an unprimeable number, because it can be changed into a prime (221285333) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 36053 + ... + 41741.

It is an arithmetic number, because the mean of its divisors is an integer number (28020405).

Almost surely, 2^221285033 is an apocalyptic number.

It is an amenable number.

221285033 is a deficient number, since it is larger than the sum of its proper divisors (2878207).

221285033 is an equidigital number, since it uses as much as digits as its factorization.

221285033 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6187.

The product of its (nonzero) digits is 2880, while the sum is 26.

The square root of 221285033 is about 14875.6523554431. The cubic root of 221285033 is about 604.8541715324.

The spelling of 221285033 in words is "two hundred twenty-one million, two hundred eighty-five thousand, thirty-three".